You can specify the two variables you want to plot rather than passing the whole data frame, like so:
data <- structure(list(V1 = c(34.88372093, 35.07751938, 35.27131783, 35.46511628, 35.65891473, 35.85271318),
V2 = c(0.00029997, 0.00019998, 0.00029997, 0.00029997, 0.00069993, 0.00069993)),
.Names = c("V1", "V2"), row.names = c(NA, 6L), class = "data.frame")
barplot(data$V2, data$V1, xlab="Percentage", ylab="Proportion")
Alternatively, you can use ggplot to do this:
library(ggplot2)
ggplot(data, aes(x=V1, y=V2)) + geom_bar(stat="identity") +
labs(x="Percentage", y="Proportion")
Probably the entire dataframe format is wrong, The same thing happened to me since I added the columns individually and made the dataframe together.
table.values = c(value1, value2,.......)
table = matrix(table.values,nrow=number of rows ,byrow = T)
colnames(table) = c("column1","column2",........)
row.names(table) = c("row1", "row2",............)
barplot(table, beside = T, xlab= "X-axis",ylab= "Y-axis")